Pneumatic Tire Tread with Double Blind Perforations

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Solution Overview

Problem

Conventional pneumatic tire treads do not effectively mitigate ambient noise, which can be a concern for noise pollution and user comfort.

Innovation Solution

The tire tread features circumferential double blind perforations on ribs, with varying numbers, depths, widths, and spacings to create specific noise mitigation patterns, optimizing noise reduction through the arrangement and density of these perforations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If conventional pneumatic tire treads are used without special noise mitigation features, then the tread structure remains simple and manufacturing is easier, but ambient noise is not effectively mitigated

Engineering Contradiction:

Improveambient noiseVSAvoidtread structure

Core Design Contradiction:

Object-affected harmful factorsVSDevice complexity

Solution Approach 1:

The patent applies porous materials by incorporating circumferential double blind perforations in the tread ribs, creating a porous structure that allows sound waves to penetrate and be absorbed by the tire interior, effectively mitigating ambient noise while maintaining a relatively simple overall tread design

Inventive Principle:

Principle #31Porous materials

Solution Approach 2:

The patent applies local quality by selectively placing perforations only in specific tread ribs rather than uniformly across the entire tread, allowing noise mitigation in critical areas while preserving structural integrity and minimizing manufacturing complexity in non-critical regions

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If circumferential double blind perforations are added to reduce noise, then ambient noise is significantly reduced, but the manufacturing process becomes more complex

Engineering Contradiction:

Improveambient noiseVSAvoidtread manufacturing

Core Design Contradiction:

Object-affected harmful factorsVSEase of manufacture

Solution Approach 1:

The patent applies preliminary action by pre-configuring the perforation patterns during mold preparation, allowing the complex perforation structures to be formed in a single molding operation rather than requiring post-manufacturing drilling or punching operations, thus simplifying the overall manufacturing process

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent applies universality by designing the perforated ribs to serve multiple functions: noise mitigation through sound absorption, structural reinforcement through rib design, and potential water evacuation, thereby justifying the manufacturing complexity through multiple benefits from a single feature

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP3575108B1Tread for a pneumatic tire and pneumatic tire

Publication Date: 2022.11.02 THE GOODYEAR TIRE & RUBBER CO

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AI summary

A tread for a tire (101) is disclosed. The tread (105) comprises a first circumferential groove (210) axially separating a circumferential first rib (110) and a second circumferential rib (120), a first outer surface of the first rib (110) having at least one circumferentially extending column comprising a plurality of individual, circumferentially extending double blind perforations (111), said column extending linearly circumferentially fully around the first rib (110).